Answer:
TRUE
Explanation
Nuclear fission is the process that provides energy to generate electricity in nuclear power plants.
Nuclear fission involves the radioactive decay of a heavy nucleus spontaneously. Such a nucleus a disintegrates into lighter nuclei and several neutrons. This reaction is a nuclear reaction and it is accompanied with a large release of energy. Each of the neurons produced further reacts with new nucleus to give newer atoms. This drives a series of chain reactions. With each reaction comes the release of large amount of energy.
The energy that results from a nuclear reaction far exceeds those derieved from chemical ones. The spontaneous decay of a nucleus helps produce energy.
The most commonly used fuel for most reactors is uranium. Uranium occurs naturally and can easily by mined.
The energy produced is channelled to drive a turbine system. Water becomes heated to steam, the steam helps to do work by turning turbines connected and designed into a magnetic field. Electricity is therefore induced by this process.
Nuclear fusion on the other hand involves the combination of small atomic nuclei to form larger ones. This process releases huge amount of energy. The energy that accompanies a fusion reaction far exceeds those of a fission reaction. Nuclear fusion is the process at work in the sun, the only star in our solar system.
As per Newton's II law we can say
Force applied is rate of change of momentum
here we have
given that
m = 0.25 kg
F = 460 N
now by above equation
so it required 0.022 s of contact time
Answer:
The electromotive force is the voltage measured across the cell terminals when "NO" current is being drawn. That is why electromotive forces are used in Wheatstone Bridges which measure the resistance of an external object.
Just measuring the voltage across a cell does not give one the true EMF because current drawn from the cell will cause a reduction of voltage of I * R where R is the internal resistance of the cell.
Answer:
The correct answer is option B)
Explanation:
Considering the given question as -
The space shuttle is located exactly half way between the earth and the moon. Which statement is true regarding the gravitational pull on the shuttle? A) The moon pulls more on the shuttle. B) The earth pulls more on the shuttle. C) Both are equal due to equal distances. D) Both are equal due to the mass of the shuttle.
We know that gravitational pull (F) between any two bodies of mass and is given by -
F = where 'r' is the distance between the two bodies.
Let ,
: Mass of the earth
: Mass of the moon
m : Mass of the satellite
: Distance of satellite from earth
: Distance of satellite from moon
Given that =
Let ==r
Force on satellite by the earth is -
=
Force on satellite by the moon is -
=
∵ Mass of earth () > Mass of moon ()
∴ >
∴ The gravitational pull of earth on satellite is more than that of the moon.
Answer:
32
Explanation:
the atomic mass is the number of protons and neutrons in the nucleus of an atom
so we will add 16 + 16 = 32